Isn&#39;T utxo commitements pretty close though if someone wanted to

the concept of commitment is basically a technical way to turn the entire utxo set into one single hash.

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22 дня назад

Tom
the concept of commitment is basically a technical...

But we do need commitments to make Fastsync real, right? This is what I remember from the Fastsync discussion on BCH Research.

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22 дня назад

Jeremy
I'm not totally sure, but I think "fast sync" is s...

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22 дня назад

Jeremy
I'm not totally sure, but I think "fast sync" is s...

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22 дня назад

Tom
the concept of commitment is basically a technical...

yes, with the neat feature that you can compute the hash of a slightly different set by just doing ec_add and ec_sub on the previous hash, instead of having to rehash the whole set

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22 дня назад

bitcoincashautist
yes, with the neat feature that you can compute th...

and that makes it possible to update hash of utxo set after each block is added, without affecting scalability

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22 дня назад

bitcoincashautist
and that makes it possible to update hash of utxo ...

and that makes it possible to have _every node_ verify the hash matches the utxo state at the height, so people who use the snapshots can trustlessly verify their snapshot

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22 дня назад

Shadow Of Harbringer
But we do need commitments to make Fastsync real, ...

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22 дня назад

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22 дня назад

remove the miner validation.

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22 дня назад

Tom
remove the miner validation.

OK, back to starting point.

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22 дня назад

miner validation is just giving a stamp of approval to the whole thing. It adds value. But is not needed.

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22 дня назад

Tom
miner validation is just giving a stamp of approva...

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22 дня назад

utxo fastsync is downloading a snapshot and validating it against a hash that hash can have varying trust levels: - random internet source - your friend - trusted people publishing it somewhere - entire network publishing and verifying it in coinbase TX

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22 дня назад

bitcoincashautist
utxo fastsync is downloading a snapshot and valida...

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22 дня назад

yeah, if you synced off some wrong state, maybe your node will stay in sync for a while, until someone spends an utxo you already thought was spent - at which point you'd get forked

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22 дня назад

notice that no full node is capable of that today. (ref) That is still a LOT of development that needs to be done. Adding it to the consensus well before anyone did that work and people showed an interest in that work is at best premature (think CTOR optimization).

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22 дня назад